Transmission-gearing.



I L* RENAULT.

TRANSMISSION GEAR'NG. APPLIGATIONHLBD JULY zo', 1910.

melma 511151123, 1912.

UNITED sgrarns 'raraNfr v.onirica noms RENAULT, or BILLANCOURT,- FRANCE.'

TRANSMISSIDN-GEABING.

To all whom t may concern .y

Be it known that I', LOUIS RENAULT, citizen of the French Republic, residing at Billancourt, Department of the Seine, in France, have invented certain new and use' ful Improvements 'in and Relating to Transmission-Gearing; and I do hereby declare.

' ble to heavy vehicles in which it is necessary to have very strong parts and Iin which the speed of the rear wheels must be largely reduced relatively to' the speed of the motor.

The accompanying drawing shows an embodiment of the invention by way of examle. p Figure 1 is a horizontal section of the device. Fig. 2 is an externalside elevation of same.

The transmission-shaft 2 extending fromthe motor'passes through the change speed gear box and entersa casing v1 connected with the framework as hereinafter eX- plained. The shaft 2 carries trunnions 3,. 3 upon .which the bevel wheels 4:, Lt-rotate idly. The latter mesh with other bevel pinions 5, 6 mounted loosely upon the shaft 2. Each of the pinions 5 and 6 carries two sets l ofteeth, one meshing with thepinions Li and 4 and the other meshing with'one of the gears 7 and 8, the shafts 9, 10 of which are perpendicular to the shaft 2 and connected with the gear case 1. Upon these shafts 9, 10 there arelikewise mounted spur pinions 11, 12 rigidly connected lwith the gears 7, 8. The spur pinicns mesh with gears 13, 14. keyed on the ends of the shafts 15, 16 carrying the wheels.

The different members ofthe device described above are completed by the necessary sleeves, brackets, bearings, etc., either plain or ball bearings and by packing rings y Specification of Letters Patent.

Application nl ed July 2 0, 1910. Serial No. 572,842.

or washers which may be useful for retaining the lubricant in'the casing 1 and'insure the efficient lubrication of the various parts. rIhe operation will be.v obvious. vWhen running ina straight line the Vpinions 4, 4', 5, 6 as a whole rotate with the shaft 2 at the same speed; the gears 7 and 8 rotate at a reduced speed inz accordance with the ratio of the teeth 5, 7 and 6,8 and the Iwheels are driven simultaneously at a reduced speed according to the ratio of the pinions 11' and 12 andof the gears meshing with them. .In turning curves the pinions 4, 4', 5, 6 as a whole operate Vas an ordinary diderential and the wheels rotate at different speeds without slipping on the ground.

The device is strong; it enables very strong teeth to-be formed on the pinions without rendering the apparatus bulky and presents the advantage that the members of lthe diii'erential are mounted upon the shaft 2 thatvis to say upon the part which is given the most rapidmovement .of rotation.

In the construction shown in the drawing, .the casing 1 and the mechanism that it con tain's' are rigidly connected with the rear axle.. This axle is preferably formed as an integral structure bowed or separated at the middle to form upper and lower sections or branches 17, 18. Oneach side, the casing carries a part 19 which is fitted to the upper f Patented July 2a, 1912.

and lower parts orbranches 17, 18, respec- 21 toa cross piece 20, the parts 17, 18 being clamped between the ends of the opposing cross members 19, 20.

tively. and which is bolted by means ofbolts f Without limiting myself to the construction shown, I claim:

1. In a reducing differential gearing for vehicles, the combination of a driving shaft, differential pinions thereon, pinions rota-- .table on said shaft in mesh with said first y named pinions, gears meshing withsaid last.'

named pinions, shaft sections, and reducing gears interposed between the respective gears and the respective shaft sections.

2. In a reducing diiferential gearing for vehicles, the combination with the axle shafts to be driven. of spur pinions, carried byI said shafts. smaller spur pmlons m mesh with saidrst named. piluioms,y gears rota.- -In tesfnflony whereof I affix my signatbf, ih lthe smallelj pniols, a, driving ture, in presence of two Witnesses.

Smm, evo lnions rotata le tereon and in f mesh with e respectivo gears, and dffer-l LOUS RENAULL ontal beve pnons fixed tosad shaft? be- Vtnesses: 1

tweex said first namedbevel pinons and in DEAN B. MASON,A mosh with the same; GEORGES BOUJE. 

